| A | B |
|---|
| adaption | a trait or behavior that helps one kind of living thing survive in its environment. |
| camouflage | an adaptation by which an animal can hide by blending in with its surroundings. |
| hibernate | to avoid the cold by using very little energy and living off body fat. |
| mimicry | an adaptation in which one kind of living thing has similar traits to another. |
| stimulus | Something in an environment that causes a living thing to react. |
| tropism | the reaction of a plant to something in its outer or inner environment. |
| fossil | any evidence of an organism that lived in the past. |
| endangered | close to becoming extinct; having very few of its kind left. |
| threatened | a classification given to a kind of organism that is found in low numbers and may become endangered. |
| extinct | said of a kind of organism that is no longer alive on Earth. |
